<template>
  <div class="login_container">
    <!-- 头像 -->
    <div class="login_box">
      <div class="avatr_box">
        <img src="../assets/logo.png" alt="">
      </div>
       <!-- 表单区域 -->
      <el-form ref="loginFormRef" label-width="0px" class="login_form" :model="loginForm" :rules='loginFormRules'>
          <!-- 用户名 -->
        <el-form-item prop='username'>
          <el-input  prefix-icon="iconfont icon-user" v-model="loginForm.username" ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop='password'>
          <el-input  prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type='password'></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
         <!-- 登陆按钮 -->
         <el-button type="primary" @click='login'>登陆</el-button>
         <!-- 重制按钮 -->
         <el-button type="info" @click='resetLoginForm'>重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
    // 这是登陆标点绑定的数据对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  // 点击重制按钮，重制表单数据
  methods: {
    resetLoginForm () {
      //   console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    // 表单登陆验证
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        this.$message.success('登陆成功')
        // console.log(res)
        // 1.保存token 只在当前网页打开期间生效 保存在sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航跳转到后台主页， 路由地址是 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
  background-color:#2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left:50%;
  top:50%;
  transform: translate(-50%, -50%);
  .avatr_box {
    height:130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position:absolute;
    left:50%;
    transform:translate(-50%,-50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom:0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
}
</style>
